Garrett Top Mount Intercooler – Subaru WRX FA20DIT (2015-2021)

Built for the FA20 WRX platform, the Garrett Top Mount Intercooler is engineered for enthusiasts looking for lower intake temperatures, improved heat resistance, and OEM-style fitment without sacrificing drivability. Featuring a 70% larger core than stock, this direct-fit charge air cooler is designed to support high-performance street and track builds while maintaining factory mounting locations and hardware compatibility.

Designed with advanced offset fin technology and vacuum brazed bar-and-plate construction, the Garrett intercooler improves airflow efficiency and thermal performance during repeated boost pulls and high-load driving conditions. Dyno testing showed gains of up to 16 horsepower and 15 lb-ft of torque while reducing intake temperatures by an average of 30°F compared to the factory intercooler.

Ideal for bolt-on and upgraded turbo FA20 builds targeting reliable, repeatable performance.

Features

• Supports up to 530 HP
• 70% larger intercooler core than stock
• Direct OEM-location fitment
• Up to 16 HP and 15 lb-ft gain
• Average 30°F reduction in intake temperatures
• Cast aluminum end tanks
• Advanced offset fin internal design
• Vacuum brazed bar-and-plate construction
• TIG welded for increased durability
• Reuses factory bolts, clamps, and hoses
• Installs in approximately 1 hour

Construction

• All-aluminum intercooler design
• TIG welded end tank construction
• Vacuum brazed bar-and-plate core
• Cast aluminum end tanks
• High-efficiency offset fin core technology

Specifications

• Part Number: 891185-6001
• Core Size: 13" x 4" x 10.2"
• Metric Size: 330mm x 102mm x 259mm
• Engine Support: Up to 530 HP
• Fuel Type: Gasoline
• Engine: 2.0L FA20F Turbo
• Installation Location: Top Mount / OEM Position

Fitment

• 2015–2021 Subaru WRX (FA20DIT)

Notes

• Minor trimming of the factory engine cover may be required for proper clearance.
• Designed specifically for FA20 WRX models. Does NOT fit STI models.

What’s Included

• Garrett Top Mount Intercooler Assembly
• Pre-installed mounting provisions
• Installation instructions

555 World LA Notes

Charge-air cooling plays a major role in maintaining consistent performance under repeated boost and heat load. A properly designed intercooler helps reduce heat soak, stabilize intake temperatures, and improve repeatability during aggressive driving conditions. Garrett’s proven motorsports engineering and OEM-style fitment make this a strong upgrade for street and track-focused WRX builds.